<template>
    <div class="app-container">
        <mt-header fixed title="黑马项目">
             <span  slot="left" @click="backbutton" v-show="flag">
                <mt-button icon="back">返回</mt-button>
            </span>
        </mt-header>
        <nav class="mui-bar mui-bar-tab">
            <router-link class="mui-tab-item-lcf mui-active" to="/home">
                <span class="mui-icon mui-icon-home"></span>
                <span class="mui-tab-label">首页</span>
            </router-link>
            <router-link class="mui-tab-item-lcf" to="/member">
                <span class="mui-icon mui-icon-contact"></span>
                <span class="mui-tab-label">会员</span>
            </router-link>
            <router-link class="mui-tab-item-lcf" to="/shopcar">
                <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="num_car">{{this.$store.getters.getAllCount}}</span></span>
                <span class="mui-tab-label">购物车</span>
            </router-link>
            <router-link class="mui-tab-item-lcf" to="/search">
                <span class="mui-icon mui-icon-search"></span>
                <span class="mui-tab-label">搜索</span>
            </router-link>
        </nav>
        <!-- 动画效果transition -->
        <transition>
            <router-view></router-view>
        </transition>
    </div>
</template>
<script>
    export default{
        data(){
            return {
                flag : false
            }
        },
        methods:{
            backbutton(){
                this.$router.go(-1)
            }
        },
        watch:{
            //this.$route.path
            "$route.path":function(newVal){
                if(newVal ==="/home"){
                    this.flag = false;
                }else{
                    this.flag = true;
                }
            }

            
        }
    }
</script>
<style lang="scss" scoped>
    .app-container{
        padding-top:40px;
        overflow-x: hidden;
        padding-bottom:50px;
    }
     .v-enter{
          opacity: 0;
        transform: translateX(100%);
     }
    .v-leave-to {
        opacity: 0;
        transform: translateX(-100%);
        position: absolute;
       
    }
    .v-enter-active, 
    .v-leave-active {
        transition: all 0.5s ease
    }
    .mui-bar-tab .mui-tab-item-lcf .mui-active {
    color: #007aff;
}
    .mui-bar-tab .mui-tab-item-lcf {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}
    .mui-bar-tab .mui-tab-item-lcf .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}
    .mui-bar-tab .mui-tab-item-lcf .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>